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  • Bell Sidetrack MIPS Helmet - Kids'
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BellSidetrack MIPS Helmet - Kids'
Sale 42% Off$34.95 $59.95

Item # BEL00B5

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Item # BEL00B5

Safety third.

The Bell Youth Sidetrack MIPS Helmet brings together all the bells and whistles your little adventurer needs when they're out on two wheels. With a mountain bike helmet-inspired design, cooling ventilation, and industry-leading Multi-Directional Impact Protection System (MIPS) safety, this helmet is comfy to wear and packs a huge dose of safety into an effortlessly cool package.

The big draw with MIPS is its ability to reduce impact force from rotational forces in the event of a crash. MIPS consists primarily of a strategically anchored liner on the inside of the helmet that looks simple, but serves a complex purpose. That little liner is designed to move independently of the helmet shell to effectively redirect impacts and reduce force. Bell incorporates its ErgoDial Fit System, which makes for an easily customizable fit and a snap-in visor that adds in some style points while keeping eyes protected from direct sun and drizzle.

  • A cycling helmet designed for kids that go hard
  • MIPS technology redirects impacts to reduce force
  • Protective polycarbonate shell with 15 vents
  • ErgoDial Fit System ensures a snug and comfortable fit
  • Low-profile visor provides some shade during sunny rides

California Proposition 65


This product can expose you to chemicals including Bisphenol A (BPA), which is known to the State of California to cause cancer. For more information go to

Tech SpecsSize
Tech Specs
Shell Material
in-mold polycarbonate
15 vents
Fit Adjustment
ErgoDial Fit System
yes, snap-in
CE EN1078, CPSC Bicycle
Recommended Use
Manufacturer Warranty
1 year


4Forty, Annex, Catalyst, Drifter, Falcon, Formula, Hub, Sixer, Stratus, Super 3R, Super Air R, Super DH, Z20

Head Circumference

20.5 - 22in

(52 - 56cm)

21.7 - 23.2in

(55 - 59cm)

22.8 - 24.4in

(58 - 62cm)

24 - 25.6in

(61 - 65cm)

Full-9, Full-9 Fusion
Head Circumference

20.1 - 20.9in

(51 - 53cm)

20.9 - 21.7in

(53 - 55cm)

21.7 - 22.4in

(55 - 57cm)

22.4 - 23.2in

(57 - 59cm)

23.2 - 24in

(59 - 61cm)

24 - 24.8in

(61 - 63cm)

Head Circumference

20.1 - 21.7in

(51 - 55cm)

21.7 - 23.2in

(55 - 59cm)

23.2 - 24.8in

(59 - 63cm)

Lil Ripper
Head Circumference

17.7 - 20.5in

(45 - 52cm)

18.9 - 21.7in

(48 - 55cm)

Local, Span
Head Circumference

19.3 - 20.9in

(49 - 53cm)

20.1 - 21.7in

(51 - 55cm)

21.7 - 23.2in

(55 - 59cm)

23.2 - 24.2in

(59 - 61.5cm)

 S / MM / L
Head Circumference

19.7 - 22.4in

(50 - 57cm)

21.3 - 24in

(54 - 61cm)

 AdultWomen / Youth
Head Circumference

20.9 - 23.6in

(53 - 60cm)

20.5 - 22.4in

(52 - 57cm)

Sanction, Transfer-9
Head Circumference

18.9 - 20.1in

(48 - 51cm)

20.5 - 21.3in

(52 - 54cm)

21.7 - 22.4in

(55 - 57cm)

22.8 - 23.6in

(58 - 60cm)

Sidetrack, Spark
Head Circumference

18.5 - 21.3in

(47 - 54cm)

19.7 - 22.4in

(50 - 57cm)

How to Measure:
For best results, use a tape measure to measure around your head where your hat would fit comfortably.

Reviews & Community


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Unanswered Question

The name says “kid” and the sizing says “one size” is this a child (up to 54cm) or youth fit (up to 57cm)?
Thank you!

Good price for a MIPS helmet

  • Familiarity: I gave it as a gift but have feedback to share

My son's been using this helmet for a couple years now, luckily no big crashes so far. The helmet looks good and fits him well. Only issue he's had with it is the buckle. When he first got it he had difficulty strapping the helmet on himself and would need my help buckling him in. Would be nice if it had one of those magnetic buckles, would be easier for him to strap the helmet on himself.

Bell Sidetrack MIPS Helmet

  • Familiarity: I've used it several times

Great fit for a 4-year-old. And room to grow!

As expected.

What more could a two-year-old want!?

  • Familiarity: I've put it through the wringer

She absolutely loves the pink design with the flower blossoms around the back. We ended up buying her the "youth" version instead of the "kids" version. It had to be cranked all the way tight when we first bought it, but she was already snug in the kid's one with it all the way loose. Now she's got plenty of room to grow into this one for use over multiple seasons. We also love how the neck strap has a protective area to prevent pinching her cute little neck when putting the helmet on / taking it off.

Insane in the membrane...

  • Familiarity: I've used it several times

This helmet is great for the young up and coming MTB riders! Got it for my 8 year old nephew and he loves it. It also gives me a little piece of mind knowing he has better than average head protection. Cool color options as well.

My Daughter Needed A New Helmet

  • Familiarity: I gave it as a gift but have feedback to share

My daughter says its comfortable and likes that it breathes. I like that it has MIPS and that she is willing to wear it. We got the Matte Pink Blossom. She likes pink and I like this pink, but we both agreed we didn't like the flowers, so we painted over the flowers. It took the paint well, so we got it to look more Ziggy Stardust then someones bad wallpaper and now we are both happy.

Great kids helmet.

  • Familiarity: I gave it as a gift but have feedback to share

My little 5 y/o love it. It fits well, so it doesn't bother her. Therefore, she actually wears it. The MIPS system gives me a bit of peace-of-mind.

Looks great, fits great

  • Familiarity: I gave it as a gift but have feedback to share

Bought this for a birthday present for my niece. She loves it. It fits perfectly, and it doesn't look dorky, so she's down to wear it.